User‐Interactive Thermotherapeutic Electronic Skin Based on Stretchable Thermochromic Strain Sensor

Lee, Giwon; Bae, Geun Yeol; Son, Jong Hyun; Lee, Siyoung; Kim, Seong Won; Kim, Daegun; Lee, Seung Koo; Cho, Kilwon

doi:10.1002/advs.202001184

Cited by 86 publications

(72 citation statements)

References 35 publications

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“…For example, a 3D honeycomb structure woven fabric triboelectric nanogenerator based on flame-retardant wrapping yarn was developed for fire escape and rescue [ 11 ]. A DC fabric TENG, which takes advantage of electrostatic breakdown phenomenon of clothes, can light up 416 serially connected light-emitting diodes [ 7 , 9 ]. In addition, the stretched yarns were embedded into TENGs can be used for motion monitoring [ 34 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

Fully Fabric-Based Triboelectric Nanogenerators as Self-Powered Human–Machine Interactive Keyboards

et al. 2021

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Combination flexible and stretchable textiles with self-powered sensors bring a novel insight into wearable functional electronics and cyber security in the era of Internet of Things. This work presents a highly flexible and self-powered fully fabric-based triboelectric nanogenerator (F-TENG) with sandwiched structure for biomechanical energy harvesting and real-time biometric authentication. The prepared F-TENG can power a digital watch by low-frequency motion and respond to the pressure change by the fall of leaves. A self-powered wearable keyboard (SPWK) is also fabricated by integrating large-area F-TENG sensor arrays, which not only can trace and record electrophysiological signals, but also can identify individuals' typing characteristics by means of the Haar wavelet. Based on these merits, the SPWK has promising applications in the realm of wearable electronics, self-powered sensors, cyber security, and artificial intelligences.

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Section: Introductionmentioning

confidence: 99%

Fully Fabric-Based Triboelectric Nanogenerators as Self-Powered Human–Machine Interactive Keyboards

et al. 2021

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“…Recently, a color shifting material in a stretchable form has been developed using liquid metal and thermochromic pigment (Figure 8d). [129,146] Embedded liquid metal inside the elastomer provides Joule heating to the thermochromic liquid crystal layer. The device can be used as a visual indicator of an external stimuli since the electrical resistance varies by the strain or pressure.…”

Section: Imperceptions Through Camouflagementioning

confidence: 99%

Transparent Soft Actuators/Sensors and Camouflage Skins for Imperceptible Soft Robotics

et al. 2020

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instruments, and wearable assistive devices, but which mostly are restricted to discrete motions. However, soft robotics with entirely soft bodied system often solve difficulties in conventional rigid robots by overcoming their constraints, exceeding the performances and creating new applications. [1][2][3] Therefore, these soft machines have already taken many roles in industrial processing, automation, marine engineering, etc. [4][5][6] Technological advances in robots and wearable devices are closely connected to optical and mechanical compliance depending on their use. By taking advantages of recent advancements in transparent actuators and sensors, combining their soft and stretchy mechanical compliance with optically transparent property affords to create a new class of soft robotics, which can be referred to as an imperceptible soft robotics (ISR). As shown in Figure 1, systematic diagram of imperceptible soft robotics describes that ISR will mainly consist of transparent systems and camouflage skin. Transparent systems embrace optically transparent soft actuators and sensors in order to build mechanically interactive robotics that are rarely seen by others. As a supportive component, camouflage skin aims to provide for transparent systems to adapt in natural environment or humans for undercover operation and safe user-friendly interactions. This new conception of imperceptible soft robotic system that exhibits optically transparent interface or visually imperceptions through camouflage skin provides new functionalities over ones without such properties. Imperceptions of an assistive wearable device can be crucially important in wearer's daily life. Mechanically compliant and visually imperceptive human assistive device can serve the user's rehabilitation process or support disabled parts in the body without discomfort, altering biomechanics, and obstructive to others. [7] In a similar fashion, robotic prosthetics that requires soft sensing capability of motherly touch for caring babies demand integrated sensors and actuators to be imperceptible. [8] Tactile sensation with an implementation of ISR delivering information to user in private also possesses a wide range of possibility in virtual/augmented reality for human-machine interface and smart-living environment. [9][10][11][12] Undercover mission enabled by disguising into nature through optical transparency or environmentally skin will also be achieved by imperceptibleThe advent of soft robotics has led to great advancements in robots, wear ables, and even manufacturing processes by employing entirely soft-bodied systems that interact safely with any random surfaces while providing great mechanical compliance. Moreover, recent developments in soft robotics involve advances in transparent soft actuators and sensors that have made it possible to construct robots that can function in a visually and mechanically unobstructed manner, assisting the operations of robots and creating more applications in various fields. In this aspect, imperceptible soft robo...

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“…Recently, several bio‐inspired materials with color‐changing ability have been developed in a variety of shapes and structures with sophisticated functions. [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ] Ko et al. developed an electrothermal soft actuator with active color‐changing functions through thermochromic pigment.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Multi‐Stimuli Responsive Actuators with Synergistic Color‐ and Morphing‐Change Abilities

Liu

Li³

et al. 2021

Advanced Science

128

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The combination of complex perception, defense, and camouflage mechanisms is a pivotal instinctive ability that equips organisms with survival advantages. The simulations of such fascinating multi‐stimuli responsiveness, including thigmotropism, bioluminescence, color‐changing ability, and so on, are of great significance for scientists to develop novel biomimetic smart materials. However, most biomimetic color‐changing or luminescence materials can only realize a single stimulus‐response, hence the design and fabrication of multi‐stimuli responsive materials with synergistic color‐changing are still on the way. Here, a bioinspired multi‐stimuli responsive actuator with color‐ and morphing‐change abilities is developed by taking advantage of the assembled cellulose nanocrystals‐based cholesteric liquid crystal structure and its water/temperature response behaviors. The actuator exhibits superfast, reversible bi‐directional humidity and near‐infrared (NIR) light actuating ability (humidity: 9 s; NIR light: 16 s), accompanying with synergistic iridescent appearance which provides a visual cue for the movement of actuators. This work paves the way for biomimetic multi‐stimuli responsive materials and will have a wide range of applications such as optical anti‐counterfeiting devices, information storage materials, and smart soft robots.

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User‐Interactive Thermotherapeutic Electronic Skin Based on Stretchable Thermochromic Strain Sensor

Cited by 86 publications

References 35 publications

Fully Fabric-Based Triboelectric Nanogenerators as Self-Powered Human–Machine Interactive Keyboards

Fully Fabric-Based Triboelectric Nanogenerators as Self-Powered Human–Machine Interactive Keyboards

Transparent Soft Actuators/Sensors and Camouflage Skins for Imperceptible Soft Robotics

Bioinspired Multi‐Stimuli Responsive Actuators with Synergistic Color‐ and Morphing‐Change Abilities

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